Support for Frontend: Sign up, Sign in, Password forget

[jensneuhaus]

Also check out issue #46 - both come together

☝️What is it? Why do we need it?

Sign in

Sign up

Password forget

📋 Todos

• [x] Checkout if https://django-rest-auth.readthedocs.io/en/latest/installation.html is the better tool for us as it brings a lot of more features
• [x] Sign in with Email + password
• [x] Sign up
  • [x] with First name + last name (please separate, image shows it wrong)
  • [x] with Email
  • [x] with password
  • [x] Send email activation link, email logic part of #46 + #36
• [x] Password forget logics, email logic part of #36
• [x] Password change logic for USer